Cadmium hampers salt tolerance of Sesuvium portulacastrum

Wali, Mariem; Martos, Soledad; Pérez‐Martín, Laura; Abdelly, Chédly; Ghnaya, Tahar; Poschenrieder, Charlotte; Gunsè, Benet

doi:10.1016/j.plaphy.2017.04.014

Cited by 11 publications

(3 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Photochemical efficiency of PSII (F v /F m ) is a good indicator of environmental stress on photosynthetic apparatus (Pagliano et al 2016). The significant reduction in the present study is in agreement with earlier studies (Wali et al 2017). However, synthesis of chlorophyll increases under SA which could be reflected in the increase in F v /F m (Brestic et al 2015).…”

Section: Discussionsupporting

confidence: 92%

The Alleviative Effects of Salicylic Acid on Physiological Indices and Defense Mechanisms of Maize (Zea Mays L. Giza 2) Stressed with Cadmium

Dakak

Hassan

2020

Environ. Process.

View full text Add to dashboard Cite

The present study evaluated the physiological and biochemical mechanisms through which exogenous salicylic acid (SA) mitigates cadmium (Cd) stress in maize. The different concentrations of Cd included 0, 5, 10 µM CdCl 2 .3H 2 O. Half of plants received salicylic acid as a soil drench. Results showed that Cd exposure reduced chlorophyll contents, chlorophyll fluorescence, photosynthetic rate and activity of catalase (CAT). However, Cd stress enhanced nonphotochemical quenching (NPQ), the production of malondialdehyde (MDA) and activities of key antioxidant enzymes superoxide dismutase (SOD), ascorbate peroxidase (APX), guaiacol peroxidase (POD). The increased activities of antioxidant enzymes and concentration of MDA were reduced by exogenous application of SA as a soil drench. Our research proves that SA, as a novel endogenous plant hormone exerts beneficial physiological effects on plants as it has a dual role in scavenging active oxygen species (AOS) and modulating redox balance to enhance photosynthetic performance in cadmium-stressed maize plants. It was concluded that SA improved plant tolerance under Cd contamination and may have alleviated the inhibitory effect of Cd on photosynthesis by protecting maize plants against oxidative damage as indicated by the marked decline in net photosynthetic rates, quantum yield and chlorophyll content as well as alteration of antioxidants activity and accumulation of MDA. Collectively, results of the present study provide an insight into the alleviative role of SA in Cd-stressed maize and propose SA as a potential candidate in mitigating Cd toxicity.

show abstract

Section: Discussionsupporting

confidence: 92%

The Alleviative Effects of Salicylic Acid on Physiological Indices and Defense Mechanisms of Maize (Zea Mays L. Giza 2) Stressed with Cadmium

Dakak

Hassan

2020

Environ. Process.

View full text Add to dashboard Cite

show abstract

“…Although great progress has been made in understanding the Cd hazard to plant photosynthetic performance (Li et al, 2013), the effects of Cd ions on photosynthetic performance varied with different Cd concentrations, plant species, and stress tolerance degrees (Ghnaya et al, 2005; Mobin and Khan, 2007; Wali et al, 2016, 2017). Therefore, the disturbance mechanisms of Cd on photosynthesis still need to be studied further.…”

Section: Introductionmentioning

confidence: 99%

Detection of Cadmium Risk to the Photosynthetic Performance of Hybrid Pennisetum

et al. 2019

View full text Add to dashboard Cite

Photosynthesis plays an essential role in plant growth and crop yield, and the mechanisms of the effects of cadmium (Cd) on photosynthetic performance require more attention. The acute toxicity of Cd in soil to the photosynthetic capacity of Hybrid Pennisetum was evaluated using gas exchange parameters, A / C i curves, light response curves, and chlorophyll a fluorescence transients after exposure to elevated Cd concentrations (0, 10, 20, 50, 70, and 100 mg kg −1 ) for a 3-month period. The results indicated that leaf Cd concentration in Hybrid Pennisetum increased with the strength of soil Cd stress and ranged from 4.9 to 15.8 μg g −1 DW. The accumulation of leaf Cd severely restricted photosynthesis and its non-stomatal limitation in regulating the photosynthetic performance of Hybrid Pennisetum . The leaf chloroplasts at 10 and 20 mg kg −1 Cd concentrations showed no noticeable change, but the chlorophyll content significantly decreased by 9.0–20.4% at 50–100 mg kg −1 Cd concentrations. The Cd treatments also decreased plant ribulose-1,5-bisphosphate (RuBP) activity ( V cmax ) and regeneration capacity ( J max ), triose phosphate utilization ( TPU ), light-saturated photosynthesis ( A max ), apparent quantum yield ( AQY ), light saturation point ( LSP ), and dark respiration ( R day ), but Cd treatment increased the light compensation point ( LCP ). The shape of chlorophyll a fluorescence transients in leaves was altered under different Cd treatments. The increased OJ phase and the decreased IP phase in fluorescence induction curves suggested that Cd toxicity inhibited both light use efficiency and photodamage avoidance ability. These results suggested that the decrease in photosynthesis through exposure to Cd may be a result of the decrease in leaf chlorophyll content, Rubisco activity, and RuBP regeneration, inhibition of triose phosphate utilization, reduction of the ability to use light and provide energy, and restrictions on electron transport in PSII.

show abstract

“…Vitoria et al (2001) suggested that the activity of SOD decreased due to the metal ions linked to the active centre of the enzyme at elevated doses of heavy metals. In fact, the inactivation of enzymes by interfering with sulfhydryl groups, interaction with the enzyme-substrate complex, or protein active groups, and denaturation of the enzyme protein were the consequence of As exposure (Reboredo et al, 2021 (Wali et al, 2017). In Suaeda maritima subjected to individual effects of salinity, arsenic and mixed impact of As and salinity induced a drop of about 30% SOD activity as compared to untreated plants (Panda et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Differential responses of growth, metals accumulation, oxidative stress and Osmo-compatible solutes in the Halophyte Tamarix gallica under Arsenic and Aluminum stress alone or combined with salt

SGHAIER¹,

Duarte

CAÇADOR

et al. 2022

Preprint

View full text Add to dashboard Cite

In order to evaluate the ecological risk generated by the heavy metals cumulation in salt-affected soils. The research was carried out in the halophyte Tamarix gallica which is known to thrive under harsh environmental occurrences. The main aim of this work was to study the tolerance and accumulation capabilities of Tamarix gallica under Arsenic, Aluminium and salt stress. Plants were cultivated in the presence of increasing concentrations of Al and As alone (200, 500 and 800 µM), or mixed with NaCl (200 mM). The results revealed that both metals altered the growth and development of T.gallica. Finding showed that the metals’ accumulation was dependent on the concentrations of the metals in the medium. Interestingly, while salt reduced As uptake, an augmentation in Al accumulation was observed. In addition, T. gallica demonstrated that APX was the predominant enzyme to scavenge excess ROS. However, SOD and GPX were sensitive to the metal, showing different behaviour in metal stress alone or combined with salt. Proline accumulated in a dose-dependent manner under Al and As stress, rather than lower or unchanged levels of glycine betaine. We also noticed a diminution in proline content caused by NaCl application while an increase in glycine betaine was remarked. On the other hand, the combined stress enhanced proline whereas unchanged levels of glycine betaine were observed. Finally, T. gallica demonstrated its potential to grow under elevated concentrations of As/Al and could be considered a suitable candidate for phytostabilization/ phytoremediation approach.

show abstract

Cadmium hampers salt tolerance of Sesuvium portulacastrum

Cited by 11 publications

References 41 publications

The Alleviative Effects of Salicylic Acid on Physiological Indices and Defense Mechanisms of Maize (Zea Mays L. Giza 2) Stressed with Cadmium

The Alleviative Effects of Salicylic Acid on Physiological Indices and Defense Mechanisms of Maize (Zea Mays L. Giza 2) Stressed with Cadmium

Detection of Cadmium Risk to the Photosynthetic Performance of Hybrid Pennisetum

Differential responses of growth, metals accumulation, oxidative stress and Osmo-compatible solutes in the Halophyte Tamarix gallica under Arsenic and Aluminum stress alone or combined with salt

Contact Info

Product

Resources

About